Vitalyte (I was wrong above, this is its current name; the formula has never changed) was developed by a marathon runner who was a biochemist by trade. He was on track to qualify for the '68 Olympics but was unable to finish the blistering hot qualifier when he got sick on GatorAid. Used his training to develop a drink with the best tolerated salts and concentrations with just enough glucose and flavor to make the drink palatable.

For me, the difference between GatorAid and Vitalyte is close to night and day. I stop drinking GatorAid when I have had enough GatorAid, not when my body has had enough fluids. I can drink Vitalyte all day and feel better drinking a lot of it than I do straight water.